Drilling apparatus



R. A. MCCALLUM DRILLING APPARATUS Feb. 26, 1952 5 Sheets-Sheet l Filed 001,. 16, 1944 Feb. 26, 1952 R. A. MGCALLUM DRILLING APPARATUS 5 Sheets-Sheet 2 Filed OCT.. 16, 1944 Feb. 26, 1952 R. A. MccALLUM DRILLING APPARATUS 5 Sheets-Sheet 3 Filed OCT.. 16, 1944 Feb. 26, 1952 R. A. MCCALLUM DRILLING APPARATUS 5 Sheets-Sheet 4 Filed Oct. 16, 1944 5 Sheets-Sheet 5 ,maud f v Y n IM w j Feb. 26, 1952 Filed oct. 1s, 1944 supporting means 'for =a drilling apparatus. yanother object is @to provide for aV drilling f ap- Patented Feb. 26, 1952 'DRILIJING APPARATUS Robert-.Anthony .McCallum, MichganCity, 1nd., 4assgnor `to Joy Manufacturing Company,. a corporation of Pennsylvania Application Octoberl, 1944, Serial No.'558;8.48

.8 Claims.

My invention relatesto drilling `tapparatua'and lmore particularly 'to improvements: in the .rotating `and 'feeding means ofzlafdrillingrapparatus of the high 'speed rotary'type especially designed for `use'in drilling blastholeszinrock'or the like.

VAn object of my invention vis Yto provide .an im- 'proved drillingrapparatus. f-Another object isto .provide an improved drilling 'apparatus of the rotary type. Stillano'ther object isftoprovide an improved rotary ldrilling `apparatus 'having improved `rotating H and vfeedingfmeans. Yet another object is' toprovide ina rotaryztypefdrilling 'apparatus improved means 'which is adjust- Lable to eiect diierentirates of rotationfand improved feeding Ameans Whichis adjustable to effect for each rateof 'drill rotation'diiferent rates of feed. Another object is Vto provide improved Still paratus an improved supporting Vmeans which is adapted to be connected tothe drilling apparatus at different points whereby thelatter may be supported` in different positions. 'These aand other objects of vvmy `invention `4-will'hereinafter more fully appear.

In the accompanying'drawings'lthere are shown for purposes of illustration two forms which my invention may assume inl practice.

In these drawings:

Fig. lis an'endelevationalzview"ofl a drilling apparatus having one fiform of` my invention `incorporated therein.

Fig.'2 is a side elevational view 4oi? `the 'drilling apparatus shown in Fig. 1.

Fig.` 3 -is'an enlarged fragn'lentarysectional view taken onthefpla'ne of the=line.3-"3 of'lFig. 4.

Fig. 4 is an lenlarged longitudinal `sectional view taken on the-'plane ofthe lined-4 of'Fg. 1.

44Fig."5 is-an enlarged longitudinal sectional view of fla portion ofthe drilling apparatus, this View taken on theplane of theline 5-5;offFig. 1.

Fig. 6 is a cross-sectonalview taken-cn the plane of the line li-BoffFig. v4.

Fig. 7 Iis aperspective viewof lthe motorrotors for *the 'drilling-apparatus. A

.Fig. l9 is 2a crossxsectional Vview taken "on :the plane lof the line .9-3 Lof, Fig-14.

'.Fig..f10 is a..crosssectional .view ktaken on. the planeA of the-line vl 0--I 0 'of'Figl 1.4.

`Figli isa longitudinal sectional-view of another form of .theinvention AIn the formof itheinvention` shown in'Figs. Ito `10 :Iinclusive lthe z; highevspeed'vrock drilling Y. apparatus of therotary-blast hole typeincludesf-ra rotary motor l shown hereingas Vbeing ofthe .iluid actuated type, :but it will.be Iobvious `thatmotors of other-types may/,be usedif desired. The mo- 'tor I has acasing 2.providing a chamber ,3,Which receives, as-shown in Figs. 5 -and,9, fluid actuated rotors 5 and. Formed on Athe rotors r5 and 6, asshown'inFig. 7,2'are .teeth Band =9fwhich mesh with `each Aother and against :which fluid acts to cause the rotors torotate. The rotor5 is fixed, as by pins I0, to.=a vshaft H which isrotatably mounted in bearings I2 and Yi3 vcarriediby` the motor casing'andby aplate l5 :attached,=1as by boltslB, to oneiend'of 'the casing. l"ixed:to the outersideofthe plate'l, as-bybolts I8, is a member I,9cooperating-with theplate litoform a chamber 20 into which the shaft ll projects, and attached `to the `portionnf the 4shaft received within thechamber 20 is a gear 2|. Ex-tending axially through the rotor'li is aa sleeve-shaped Amember or hollowdrillspindle 23 rotatably supported in bearings 24-fand 25 Vcarried respectively by ytheplatefl and the motorfcasing 2. 4Bearings v2'l carried by the sleeve-shaped member '23 .-roitatably `support the rotor v6, fand a hearing .28 carried by the member 23 rotatably'supports a gear '29 which 'meshes with the `gear ,2| in the chamber 20. Thegears 2l and j29 gare so i: designed that the gear l291s rotatedxbythe gear `2| at a speed somewhat below thatof 'the 'rotor` 6. Formed ,in the member 23 is.,alongitudinalgroove 30 receiving a keyl .whichrhasflaportion 32 adapted to beireceived in anotch 34.formed in an inwardly `projecting portion 35 of .the rotorl `6. The.:key"3| ,also has another portionvSG-a which is receivable in one of the notches 38 formed in` `an inwardly projectingyportion 39 ofythe gear 2,9. When the :key -3 l is in the position-shownyinFig. 5,*-the sleeveeshaped member 23 is connected to the rotor 6for vrotation therewith; and thegear 23 rotates 'on the bearing 28 free of the member 23. Withythe-key movedtof-a position sozthatits portion 36 extends into thenotchf38 in-the gear 29 and its portion 3211s `removed from the notch 3.4; the member 23 isfconnected to4 rotatewithzthe gear 29, and therotor l:v turns freely on Athe bearings 21. .The key 3lzisprovidedwithxnotches `lll by-means of Vwhichqit.isadjusted-'to the desired positions in .thefgroove 30-and then held in `such positions by-aconventional split snap' type lockingfring 4I vrwhich is :seated inan annularvgroove 42 ion' the exterior periphery of ,the. sleeve member 23. The pupperend ofthe key 3|,.which 4projects externally `of the drillfhousing as shown in'r Fig. 5, z may be: suitably :gripped :by .theI operator `to :ef-.-

fect sliding of the key endwise in the groove 30, and as the key is moved endwise the ring 4| is expanded and snaps into a notch 40 when the latter is brought into registry with the groove 32. Thus, the snap ring 4| may lock the key 3| in either of its two adjusted positions.

Motor operating fluid is delivered from a conduit 44 under the control of a manually operated valve 45 to a passage 46 formed in the motor casing and opening, as shown in Figs. 4 and 9, into the chamber 3 at a point midway between the ends of the rotors. The fluid acts on the rotor teeth 8 and 9 to cause the rotors to turn on their bearings, and the fluid is then carried in the spaces between the teeth on each rotor to a chamber space 41, shown in Fig. 9, which communi- Cates with a discharge passage 48.

Extending axially through the sleeve-Shaped member 23 is a hollowshaft 49 to one end of which a drilling implement is adapted to be connected, and to the other end of which a cleansing liquid is supplied from a hose connection 50 through a conventional swivel Formed in the shaft 49 are longitudinal grooves 52 slidably receiving, as shown in Fig. 6, keys 53 which are xed in grooves 54 formed in the inner wall of the sleeve-shaped member 23. It will be seen that the shaft 49 will be caused to rotate with the member 23 but may slide longitudinally relative to the latter. threads 55 meshing with the threads 56 of a feed nut 51. Attached to the motor casing, as by bolts 59, is a casing 60 carrying bearings 6| and 62 which rotatably support the feed nut, and the casing 60 forms a chamber 63 in which the feed nut and its rotating means, generally designated 64, is enclosed.

The rotating means for the feed nut includes a series of gears 66, 61, 68 and 69 mounted freely to turn on a hollow shaft which is rotatably supported on bearings 1| and 12 carried by the casing 60. Surrounding the fed nut and fixed to the latter, as by a key 14, are gears 15, 16, 11 and 18 meshing respectively with the gears 66, 61, 68 and 69. Thus there are provided four pairs of gears each providing a different reduction. Fixed to one end of the holow shaft 10 is a gear 80 meshing with a gear 8| fixed to the sleeveshaped member 23. Opening through opposite walls of the hollow shaft 10 are slots 83 and 84 extending throughout the portion of the shaft surrounded by the gears 66, 61, 68 and 69. A key 86 extends through the slots 83 and 84 transversely of the shaft 10 and is adapted to have its ends received in grooves 81 formed in the inner portions of the gears 66, 61, 68 and 69, as shown in Figs. 4 and 10. The key 86 is carried by a cylindriial member 88 reciprocably received within the shaft 10 and rotatably connected through a bearing 90 to a rod9| which extends through an opening 92 in a plate member 94 attached to the lower end of the casing 60. Formed on the rod 9| is a rack portion 95, and a pinion 96 engages the teeth of the rack portion and is fixed to a shaft 91 which is rotatably supported by the plate member 94. Attached to the shaft 91 is an operating handle 98 by means of -which the pinion 96 is rotated so as to move the rod 9| for positioning the key 86. Formed in the rod 9| are notches |00 which are adapted to receive a spring pressed ball 0| for holding the rod in the desired positions. Attached to the outer end of the feed nut is a member |02 which may be grasped by the operator of the drill for holding the feed nut against rotation while the shaft 4'9 is rotated by Formed on the shaft 49 are 1 the drill motor so as to effect reverse feeding of the drilling implement, or for rotating the feed nut relative to the shaft 49 when the motor is stopped so as to effect either a forward or reverse feed.

The drilling apparatus is provided, as shown best in Fig. 10, with supporting means, generally designated |04, which is being claimed in my copending divisional application Ser. No. 75,667, led February 10, 1949. This supporting means comprises a support member member |05 having formed integral therewith a swivel plate |06 adapted to be clamped in a saddle mounting or any other suitable support. The support member |05 is mounted at one end on a pin |001 which is receivable in openings |08 formed in flange portions i |0 made integral with the casing 60 at opposite ends of the latter. The other end of the support member has a bolt'lll pivotally connected thereto, and this bolt extends between flange portions ||2 on the casing 60, Figs. 4 and 10, and has a nut ||4 threaded on its outer end and engageable with the flange portions ||2 for clamping the support member firmly to the casing 69. The openings |08 in the flange portions ||0 are located at opposite corners of the casing 60 so that the support member may be positioned at either side of the drilling apparatus, and the sides ||5 of th'e flange portions ||2 are oppositely inclined so that the nut ||4 may engage either side. It will be seen that the supporting member |05 may be clamped to either side of the casing 60 thereby permitting the drilling apparatus to be mounted for drilling in opposite positions relative to the supporting means.

In setting up the drilling apparatus, the support member |05 is placed at the side of the casing 69 to permit drilling in the desired direction and is clamped to the casing by extending the pin |01 through the openings |08 and threading the nut i|4 on the bolt until it firmly engages the surfaces ||5 at one side of the flange portions |2. If a high speed of rotation for the drilling implement is desired, the key 3| is moved to the position shown in Fig. 5 so that the rotor 6 is connected through the key portion 32 to the sleeve-shaped member 23 for driving the latter. Since the shaft 49 is keyed directly to the member 23 it will rotate at the same speed. To drive the drilling implement at a lower speed it is only necessary to move the key 3| to a position so that its portion 36 extends into a notch 38 in the gear 29 and its portion 32 is removed from the notch 34 in the rotor 6. As the sleeve member 23 rotates, it drives the hollow shaft 10 through the gears 80, 8|, and one of the gears 66, 61, 68 and 09 rotates with the shaft 10 depending on the position of the key 86. The one of the gears 15, 16, 11 and 18 meshing with the gear driven by the shaft 10 causes the feed nut 51 to be rotated in the same direction as the shaft 49 but at a faster speed, thereby effecting feeding movement of the shaft 49 in a direction to move the drilling implement toward its Work. It will be seen that four different rates of feed may be obtained for each speed of rotation of the shaft 49, the rates of feed for the high speed of rotation of the shaft 49 being greater than those obtained through the same connections when the shaft is rotated at a slower speed. To feed the drilling implement in a rearward direction, the key ismoved to a position between the gears 56, 61, 68 and 69 so that all of these gears are free of the shaft 10 and the driving of the feed nut is discontinued. The drill operator then meng-'san g1-ases the member :mz and noie-e .the feed .nur "against rotation while thefshaft 491s.l rotated fbylthe drill motor. :To '.xnovel fthe 'drilling imple Yfeed nut 'may be :rotated :manually .throughthe?v member m2 whue tne-fdrmfmoter isietoppeu and .thefshaft -49 is''stationary as regards rotation.

6 VWhen the Vrbd '|5| is :adj usted 'to position 'the pulley `members |43, ythe pulley belts 4|60 are {forcedfto positions fatwhich their opposite sides engage the l'beveled surfaces of the pulley memm'tne fermer tnefmvenuonshown menig. n the feeding and supporting fm'eans for the=shaft A49 is like that described in therstfformofthe 'invention r:and ylike Aparts have vbeen given likel *reference Inumerals.. The `rotating-means', "howfever, "includes Ja tubular :member '|20 .through I which v"the shaft i49-extends and towhich the lat-, i ter `is connected, as by -avlkey4 l|2'-|, 'for rotation f therewith. The member |20 is -`rotatably supported-by bearings |22 'and |23 `carriedby acas- Aas by -keys'against rotation relative thereto but Azo orpuuey members lzt'anerrz'l. 'The-pulley memmovable longitudinally vthereof are several "pairs bers V|26 are spaced apart `by 'blocks |28, and a clamping 'rod |29 "extends "through'openings [in the pulley'members and the blocks vfor holding the Amembers 26 together to move 'as a unit'.

The pulley 'members |21 are `spaced by blocks '|31 and clamped together in `asimilar Amanner by ka rod |32. vThe lower `pulley "member '|21 abutsacollar |33rotating withthe tubular'member |20 and held.againstmovement'axially ofthe member .|20 by "a shoulder |34 "formed on the latter. A'spring |'35acts between thel upper lpul-v ley member |26 andthe'inner ring ofthebearing |22 "for yieldably urging the'pulleymem'bers |25; toward the members |21. There `may be .proe l vided in place 'of thezsprin'gQif desired,'a.manual" 1y operated means for adjusting the positions of .ing with gear 80 carried bythe tubular'shaft 10.

The `rate of lfeed is governed, as described Ain the .first vform of the invention, fby positioning the key'SBto connect one of the gears 66, 61, '68 and 'n `ll'to thexshaft 10 so that it drives vthe feed nut `5.1 through `the one of the gears 15, 16, 11 and l1B meshing-therewith. It will .be seen 'that for each change iin the speed `of rotation ofthe Ashaft'49, a corresponding change in the rate of feed `is vobtained through each of the sets of feeding gears.

'Asa result 'of my invention there is `providedran improved `drilling apparatusv havingimprovedrotationsandfeed.control means. Feedingmay be v'effected at 'different sp'eedsiforeach speed of rotation of the drilling implement, and the :speed 'of rotation may bereadily adjusted.

` While `there 'are in vthis Aapplication specifically described -two forms which the invention 'may assume Ain practice, it will vbe understood V'that these forms `of the Vsame are-shown "for purposes of illustration, vand that :the Vinvention :may '.be

modified lvand embodied in 'various 'otherfforms the pulley vmembers lun; .relative te the ,mem-

bers |21. 4Connected'to theeasing |24.` is apower ilnitshown herein as an ,electric motor |38.hav

ing a power Shaft |39 proj'ectinginto the casing |24 in parallelism with the sa'ft4'9 'and rotatablyjl supported at its lower end by a bearing |4| carried by the casing |24. Surrounding the power shaft are pairs of pulley members |42 and 43 vflxed'torotate with lthe power shaft but .movable longitudinally thereof. I'he pulley members |42 .withoutcdeparting fromitsfspirit or the scope 'of theappendediclaims.

vWhat l fclaim fas'new 4and desire to fsecure "by "LettersPatent'is 1. -A drillingapparatus comprising, in 'combination, a. vfluid factuatedimotor having a pair .of geared :rotors rmeshing lwith each other, :means for supplying an operating fluid to `saidirotors', a drive sleeve lextending axially vthrough one of said rotors, `.gearing driven :by the other oflsaid and |nere-speelsereepeetiveiylbylbloeks |44 and |45, and are clamped together by bolts intendi;

|41. lThe lower pulley member |43 engages the inner ring of the bearing |4|,-and .the upperypulley member 42 abuts ashoulder- |49 on the power shaft. 4Extending axially .through the power v`means 'for feeding said drill shaft-through Isaid shaft is a.rod |5| which is threaded into aplate.

|52 Aengaging the lower side of the 'bearingM-I;

The upper' end of the rod |5| isthreaded'intoanj' opening |54 extending through "a member |55 which` is rotatably supported by the upperend 'of the'fmotor |30. The member |55 is adapted :to

be` manually rotated so as to causethe rod |5| to be `threaded into the opening |54 for adjusting the position 4of the plate 52. |52zis1raised, the bearing |4|=isinioved1iipw`ardly with it forcing the pulley members |43 toward the members |42. The adjacent faces o f the When fthe-plate pairs of pulley members |26, |21 and |42, |43 Y rotors Aand including a gear coaxial with said lsleeve, A'means 'for connecting. selectively said `drive `sleeve in dri-ven relation `with `the oneof said `rotors throug'h 'whichit `extends and with said gear, a drill1shaft-extending through said-drive .'sleeve'and connected for `rotation therewith, tand drives'leevefsaidfeedingmeans includingthreads on-said `drill shaft, Ua ifeed nut threadedly 'engag-l ing fthethrea-ds on'said drill shaftjand means yfor connecting said feednut in ldriven relation with. 'said fdrive'sleeve.

bination, a fluid actuated motor having a `pairof f2. A v'drilling v*apparatus comprising, in com# geare'drotors meshing witheach other, meansfor supplying (an operating fluid to said rotors, 4a drive sleeve extending axially through one of said rotors, gearing driven by the other of said rotors including a gear coaxial with said sleeve, a key slidably mountedin a groove in said drive sleeve and engageable selectively with the one of -e said rotors through which said drive sleeve extends and with said gear, a drill shaft extending through said drive sleeve and connected for rotation therewith, and means for feeding said drill shaft through said drive sleeve, said feeding means including threads on said drill shaft, a feed nut threadedly engaging the threads on said drill shaft andmeans for connecting said feed nut indriven relation with said drive sleeve.

3. A drilling apparatus comprising, in com'- -bination, a fluid actuated motor having a pair of geared rotors meshing with each other, means -for supplying an operating uid to said rotors, a drive sleeve extending axially through one of said rotors, gearing driven by the other of said rotors including a gear coaxial with said sleeve, means for connecting selectively said drive sleeve in driven relation with the one of said rotors through which it extends and with said gear, a drill shaft extending through said drive sleeve and connected for rotation therewith, and means for feeding-said drill shaft through said drive sleeve, said feeding means including threads onsaid drill shaft, a feed nut threadedly engaging the threads on said drill shaft, a plurality of gears each providing a different speed and arranged coaxially with said feed nut and fixed to the latter for rotation therewith, gears meshing with said plurality of gears and means for connecting said last mentioned gears selectively in driven relation with said drive sleeve.

'4. In a drilling apparatus, in combination, a drill spindle, a fluid actuated motor having geared rotors meshing with each other, one of said rotors arranged coaxial with said spindle, speed changing 'gearing driven by another of said rotors in' cluding a driving element coaxial with said spindle and rotating at a speed different from the speed of rotation of said one of said rotors, and means for connecting selectively said one of said rotors and said driving element in driving relation with said spindle whereby the latter may be driven at either of two different' speeds.

5. In a drilling apparatus, a casing, a shaft A 'ournaled withinsaid casing, a pressure fluid operated motor comprising a pair of intermeshing toothed rotors one of "which is coaxial with and surrounds said shaft, a rotatable member coaxial with said shaft, speed reducing gearing connecting said other rotor and saidmember whereby said" member rotates at a speed different from that of the' speed of said one rotor, and shiftable means operable at will for alternatively connecting said one rotor and said member in driving relation with said shaft.

6. In a drilling apparatus, a casing, a shaft journaled within said casing, a pressure fluid operated motor comprising a pair of intermeshing 'toothed rotors, one of said rotors being of substantially larger diameter than the other and arranged coaxial with said shaft, a rotatable member coaxial with said shaft, speed reducing gear connecting said smaller rotor and said member for rotating the latter at a speed different from the speed of said large rotor, and shiftable means for alternatively connecting said large rotor and said member in driving relation with saidshaft.

'7. In a drilling apparatus, the combination comprising a drill spindle having akeyway ex-f tending lonigt'udinallyl thereof', ya' motor having a motor rotor element coaxial with said'spindle and through'which said spindle extends, speed reducing gearing driven by said motor including a driven element coaxial withsaid spindle and -v rotating at a speed substantially slower than the speed .of rotation of said motor rotor element, a slidingf key engaging said keyway and movable `'selectively into engagement-with said elements whereby said drill spindle may be driven at either of two differentspeeds, a Vdrill rotating element having splined connection with said drill spindle whereby said rotating elementmay rotate with saidspindle while axial movement of said rotating element relative to said spindle is permitted, and means for feeding said rotating element axially relative to said spindle including speed reducing gearing driven by said spindle.

8. In a drilling apparatus, the combination comprising a drill housing, a tubular shaft journaled in said housing, a tubular feed nut journaled in said housing in longitudinal alignment with said shaft, an externally threaded feed screw extending axially through said shaft and said nutl and splined to said shaft for rotation therewith and vfor axial movement relative thereto, said feedvnut having internal threads engagingth'e external threads on said feed screw, a fluid operated motor having intermeshing rotors actuated by pressure fluid, one of said rotors being arranged in coaxial relation with said shaft and through which said shaft extends, a driving connection between one of said rotors and said shaft including a driven element secured to the outer end of said shaft for driving the latter, speed reducing gearing between the inner end Aof said shaft and said feed nut for rotating the, latter at aspeed different from the speed of rotation of Asaidshaft wherebyy said feed nut may effectaxialmovementof said feed screw relative to said, shaft, and a drilling implement driven by said feedscrew.. V

ROBERT ANTHONY MCCALLUM.

" REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 535,451 Meissner Mar. 12, 1895 l '141,320 Fletcher oct. 13, 1903 1,177,110 Jardine et a1.' Mar. 28, 1916 l1,321,393 Roseberry Nov. 11, 1919 1,935,211 Krohn Nov. 14, 1933 1,977,061 'Hey Oct. 16, 1934 1,977,490l Sawyer Oct. 16,1934 2,041,578 Tautz May 19, 1936 2,160,274 Lopez May 30, 1939 2,177,011 Whithead Oct. 24,1939 2,202,554 Heyer et al May 28, 1940 2,233,822 Schubbe Mar. 4, 1941 2,293,617 Myers Aug. 18, 1942 12,331,179v4 Fossum Oct. 5, 1943 

